US Bridges

Nicholson RD over SR 0079 NB SB

Fair

Allegheny County, Pennsylvania · 1/4 S.W.Of I279 · Structure no. 000000000001994

Built
1973
52 years old, rebuilt 2008
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
328 ft
4 main spans
Daily traffic
3,458
2024 count
Owner
State
State Highway Agency

About this bridge

Nicholson RD over SR 0079 NB SB is a steel continuous stringer/multi-beam or girder carrying Nicholson RD over SR 0079 NB SB in Allegheny County, Pennsylvania. It was built in 1973 and reconstructed in 2008, so it is 52 years old, younger than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 3,458 vehicles a day, roughly 9% of them trucks, projected to reach 8,455 by 2032. The structure is 328 ft (100 m) long and 48 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesNicholson RD
CrossesSR 0079 NB SB
Location1/4 S.W.Of I279
RouteState Highway 0
CountyAllegheny County
StatePennsylvania
Coordinates40.58322, -80.10473
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating35.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length328 ft (100 m)
Longest span99 ft (30.2 m)
Deck width48 ft (14.6 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,458 (2024)
Projected traffic8,455 by 2032
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$1.4 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nicholson RD over SR 0079 NB SB built?

It was built in 1973, making it 52 years old in 2025. It was reconstructed in 2008.

What condition is Nicholson RD over SR 0079 NB SB in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2024.

How much traffic does Nicholson RD over SR 0079 NB SB carry?

About 3,458 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is Nicholson RD over SR 0079 NB SB?

The structure is 328 ft (100 m) long with a longest span of 99 ft (30.2 m) and a deck 48 ft wide.

Who owns Nicholson RD over SR 0079 NB SB?

It is owned by the State Highway Agency.